file uploding action not get invoke - asp.net-mvc

Question

I'm working on ASP.Net MVC project using Visual Studio 2017 . When i click File upload button it not direct to controller method it directs to a blank page .This page worked as expected Few hours ago nothing changed ,but now im getting this issue Browser console gives me this error .
The character encoding of the plain text document was not declared.
The document will render with garbled text in some browser
configurations if the document contains characters from outside the
US-ASCII range. The character encoding of the file needs to be
declared in the transfer protocol or file needs to use a byte order
mark as an encoding signature
.
View code
#using Microsoft.AspNetCore.Mvc.Localization
#inject IViewLocalizer Localizer
<div class="box">
<div class="box-header">
<h3 class="box-title">#Localizer["ImportWorkFile"]</h3>
<h1>#ViewBag.message</h1>
<form action="#Url.Action("ImportWorkers")" method="post" enctype="multipart/form-data">
<input type="hidden" name="OrganizationId" value="#Model"/>
<input type="hidden" name="send" value="true" />
<div class="form-horizontal">
<div>#Localizer["Only"] <strong>.csv</strong> #Localizer["FileSuported"]</div>
<div class="form-group">
<label for="importFile" class="col-md-2 control-label"></label>
<div class="col-md-12">
<input id="importFile" name="csvFile" type="file" class="form-control" required />
</div>
</div>
<input type="submit" name="name" value="#Localizer["Send"]" />
</div>
</form>
</div>
</div>
Controller Method
[HttpPost]
public ActionResult ImportWorkers(bool send, long OrganizationId)
{
}